目的 研究不同温度的3.5%(质量分数)NaCl溶液中TiAlCN涂层耐腐蚀性能的变化，并进一步探究温度对涂层表面钝化膜性能的影响。方法 采用扫描电镜(SEM)、X射线衍射仪(XRD)、拉曼光谱仪和X射线光电子能谱仪(XPS)表征涂层的微观形貌和物相组成;通过动电位极化、电化学阻抗谱实验评估TiAlCN涂层的耐腐蚀性;进一步，先通过恒电位极化使涂层表面生成稳定的钝化膜，再利用X射线光电子能谱仪和Mott-Schottky测试探究钝化膜结构和半导体性质。结果 TiAlCN涂层表面存在凹坑、颗粒和针孔，截面呈现出明显的柱状晶结构;涂层为面心立方结构，主要由TiC、TiN相组成;随着温度的升高，腐蚀电流密度及钝化电流密度增加，容抗弧直径减小，涂层的耐蚀性降低;TiAlCN涂层钝化膜的主要成分为Al2O3和TiO2，且二者含量随着温度的升高而减小。在20 ℃和80 ℃的温度条件下，TiAlCN涂层的钝化膜表现出n型半导体性质，且钝化膜的施主密度值从1.14×10¹⁶ cm^?3增加到3.27×10¹⁶ cm^?3，钝化膜的保护能力降低。结论 温度对TiAlCN涂层的耐腐蚀性有显著影响，高温会降低钝化膜的致密性及增加施主密度，使钝化膜的保护性降低，从而降低涂层的耐蚀性。

Mechanical parts are easy to fail under the action of high temperature and corrosion environment, physical vapor deposition coatings can be used to improve the surface performance of these parts and increase their service life. The corrosion resistance of coatings is related to their passivation performance. Thereinto, the temperature plays a key role in the passivation performance of the materials, thus tuning their corrosion rate. This work studies the change of corrosion resistance of TiAlCN coatings in the 3.5 wt.% NaCl solution at various temperature and further reveals the mechanism that how the temperature affects the corrosion resistance and passive film properties.